JP3321321B2 - Nylon lightweight heavy fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel lightweight nylon fabric having a feeling of dryness and sharpness.

[0002]

2. Description of the Related Art Conventionally, a thick nylon fabric made of a fine-fiber yarn has less strength reduction due to ultraviolet light and a vivid hue by dyeing compared with a polyester thick fabric, and can be subjected to higher processing such as coating. It is widely used in textiles for industrial materials such as bags, tents and sails of sailboats.

[0003] However, the thick nylon fabric made of these fine yarns is heavy and lacks a feeling of wearing when used for outdoor wear such as fishing and light mountain climbing, or sportswear such as skiing and snowboarding or casual wear. is there. In addition, there was the problem of being hated by the slimy texture unique to nylon. Even if used, the weight of the fabric is heavy, so there has been a strong demand for a lightweight nylon fabric that can be partially used and used as a body fabric.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above situation, and can be used as a body material for various kinds of wear with a feeling excellent in dry feeling and sharpness. It is intended to obtain a lightweight nylon heavy-weight fabric.

[0005]

The present invention attains the above object and has the following constitution. That is, the present invention relates to a method comprising: "having a hollow ratio of 5 to 30%, a single-fiber fineness of 5 denier or more, a total fineness of 300 denier or more, an irregularity of 1.5 to 3.5, and a projection on the outer peripheral portion. , Hollow inside
The present invention is characterized in that the fabric is composed of a nylon hollow multifilament yarn having a well-shaped irregular cross-sectional shape having a nylon shape. Less than,
The present invention will be described in detail.

In the present invention, first, the fibers constituting the woven fabric have a hollowness of 5 to 30%, a single-fiber fineness of 5 denier or more, a total fineness of 300 denier or more, and an irregularity of 1.5 to 3.0.
Nylon hollow multifilament yarns having an irregular cross-sectional shape of No. 5 are used. This nylon hollow multifilament yarn may be a polyamide polymer that can be melt-spun.
Nylon 6 fiber, nylon 66 fiber or the like is used. Also,
These fibers may be added with a third component or copolymerized for the purpose of improving performance.

[0007] The hollow ratio of the nylon hollow multifilament yarn comprising a polyamide polymer as described above must be 5 to 30% according to the following formula [1]. Hollow ratio (%) = [A / (A + B)] × 100 [1] (where A is the area of the hollow portion and B is the area of the non-hollow portion) When the hollow ratio is smaller than 5%, the normal non-hollow portion The difference in weight with the fiber is small, resulting in a lack of lightness.
When the hollow ratio is larger than 30%, the lightness is improved, but the melt spinning is difficult, and the spinnability tends to be poor. In addition, the strength of the fiber is reduced, the abrasion resistance is weakened, and the problem of fibrillation is caused. Care must be taken because

The degree of irregularity of the nylon hollow multifilament yarn can be represented by a value obtained by dividing the diameter of the circumscribed circle of the fiber cross section by the diameter of the inscribed circle. In the present invention, the irregularity is
It must be in the range of 1.5 to 3.5. The degree of irregularity is 1.
If it is lower than 5, fine deformation is not formed on the outer peripheral portion of the fiber cross section, it becomes a shape close to the round cross-sectional shape of ordinary yarn, and it is caused by the irregular cross-sectional shape where the outer peripheral portion of the fiber cross section is finely deformed Care must be taken because the texture is inferior to the dry and crisp textures, and the slimy texture is unique to nylon. Conversely, when the degree of irregularity is higher than 3.5, the feeling of dryness and sharpness is excellent, but the abrasion resistance is weakened, which is not suitable.

[0009] By forming the irregular cross-sectional shape, the gap between the single yarns is increased, and the light weight effect in the woven fabric is increased. That is, by using hollow fibers of irregular cross section, the weight is reduced by the hollow ratio and the weight is reduced by increasing the gap between the single yarns, thereby further increasing the lightening effect.

As shown in FIG. 1 (a) , the cross-sectional shape of the nylon multi-filament hollow multi-filament hollow multifilament used in the present invention has a well-shaped shape having a projection 1 on the outer periphery and a hollow 2 inside. belongs to.

[0011] Next, it is necessary that the single-filament fineness of the hollow multifilament hollow yarn having a modified nylon cross section is 5 denier or more. If the single yarn fineness is less than 5 denier, the feeling of dryness and sharpness will be lacking, which is inappropriate. The total fineness of the hollow multifilament yarn having a modified nylon cross section must be 300 denier or more, and preferably 500 denier or more. When the total denier of the hollow multi-filament yarn having a cross section of nylon is less than 300 denier, the thickness difference from the conventional thick fabric for clothing is small, and the heavy fabric with a sense of weight intended by the present invention cannot be obtained. , Inappropriate.

In the present invention, a woven fabric is formed by using a hollow multifilament yarn having a modified nylon cross section as described above. In this case, the woven fabric is woven as a warp or a weft, or used as both a warp and a weft. . As described above, it is possible to obtain a lightweight nylon fabric having excellent dry and sharp feeling.

[0013]

As in the case of the lightweight nylon fabric of the present invention, when a woven fabric is formed using a nylon hollow multifilament yarn having a deformed cross section in which the outer periphery of the cross section of the hollow fiber is finely deformed, the hollow section of the fiber has a fiber cross section. Due to the extra space between the single yarns due to the irregular shape of the outer periphery, it is possible to obtain a lightweight nylon fabric that has a thick feel that can be used as an upper body fabric, but is actually excellent in the feeling of lightness. Moreover, the combination of the large fineness single yarn and the irregular cross-sectional shape of the fiber,
It is possible to obtain an excellent feeling of dryness and sharpness.

[0014]

EXAMPLES Next, the method for producing a lightweight heavy-weight fabric according to the present invention will be described in detail with reference to examples. The performance of the fabrics in the examples was evaluated by the following method. (1) Lightness Measure the thickness (mm) of the sample to be measured and the weight (g) per square meter, and determine the weight per square meter as the thickness (m
m). A smaller value indicates a lighter weight. (2) Feeling The feeling was relatively evaluated by a sensory test by handling.

Example 1 Relative viscosity (1 g / 100 ml, 98% H ₂ SO
_4, 25 ° C.) is used 3.4 nylon 6 chips, fiber cross-section by using a spinneret as a well-type hollow cross section shape shown in the (b) Figure 1, a known spinning conventionally drawing two step 670 d fineness and 96 filaments
This gave a nylon hollow multifilament yarn having a well-shaped cross section having a single yarn fineness of 7.0 d, a hollow ratio of 12% and a degree of irregularity of 1.8.

A matte wool having a warp density of 46 yarns / inch, a weft yarn density of 38 yarns / inch and a weaving width of 148 cm was woven by using the well-shaped hollow multifilament yarn for both the warp and the weft.

Next, the woven fabric was scoured by a conventional method using a low-tension type spreading and refining machine, followed by ordinary pre-setting, spreading and dyeing, and finishing by a pin tenter. In this way,
A lightweight lightweight nylon fabric of the present invention having a warp density of 46 yarns / inch, a weft yarn density of 38 yarns / inch, and a finished width of 149 cm was obtained.

For the purpose of comparison with the present invention, a spinneret having a round cross-section shown in FIG. Nylon thick fabric (in the same manner as in the present example) except that a multi-filament nylon multifilament yarn having a round cross section having a filament number of 96, a single yarn fineness of 8.8 d, a hollow ratio of 0%, and a degree of irregularity of 1.0 was spun. Comparative Example 1)
I got

For comparison with the present invention, a spinneret having a non-hollow well-shaped cross section as shown in FIG. Was used to obtain a nylon non-hollow multifilament yarn having a well-shaped cross section having a fineness of 750d, a number of filaments of 96, a single yarn fineness of 7.8d, a hollowness of 0%, and a degree of irregularity of 1.8. A nylon thick fabric (Comparative Example 2) was obtained in exactly the same manner as in this example except that this yarn was used.

For the purpose of comparison with the present invention, a spinneret having a four-hole cross section shown in FIG. 2C was used instead of the nylon hollow multifilament yarn having a well cross section in this embodiment. , Fineness 730d, number of filaments 9
Six nylon hollow multifilament yarns having a four-hole cross section with six single yarn finenesses of 7.6 d, a hollow ratio of 12%, and a degree of irregularity of 1.3 were obtained. A nylon thick fabric (Comparative Example 3) was obtained in exactly the same manner as in this example except that this yarn was used.

The performances of the present invention and the comparative nylon thick fabric were measured and evaluated, and the results are shown in Table 1.

[Table 1]

As is evident from Table 1, the nylon lightweight heavy-weight fabric of the present invention is richer in lightness and more excellent in dryness and sharpness than the comparative heavy-weight fabric.

[0023]

According to the present invention, it is possible to obtain a lightweight nylon fabric having a unique feel and a dry feeling and a sharp feeling.

[Brief description of the drawings]

FIG. 1 (a ) is a cross-sectional view of an example of a hollow fiber having a modified cross section used in the nylon lightweight heavy fabric of the present invention.

FIGS. 2 (a), (b) and (c) are cross-sectional views of a round cross-section fiber, a modified cross-section non-hollow fiber, and a modified cross-section hollow fiber used for a heavy-weight fabric for comparison with the present invention, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Projection part 2 Hollow part 3 Projection part 4 Hollow part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D03D 15/00 D01F 6/60

Claims (1)

(57) [Claims] 1. A hollow fiber having a hollowness of 5 to 30%, a single yarn fineness of 5 denier or more, a total fineness of 300 denier or more, an irregularity of 1.5 to 3.5, and a projection on an outer peripheral portion, Hollow inside
A lightweight nylon heavy-weight woven fabric comprising a hollow hollow multifilament yarn having a well-shaped irregular cross section having a portion .